Die for making drive-chains



(N0 Model.) 2 Sheets-Sheet 2. S. D. LOO.KE.

DIE PUR MAKING DRIVB GHAINS. r N0 393.913. Patente-d Beo. 4., 1888.

UNI-TED STATES PATENT OFFICE.

SYLVANUS D. LOCKE, OF HOOSICK FALLS, NEW YORK.

DIE FOR MAKING DRIVE-CHAINS.

SPECIF ICATION forming part oi Letters Patent N0. 393,913, dated December 4, 1888.

Original application filed February 20, 1888, Serial N0. 264,666. Divided anal this application file(l May 9, 1888. Serial No.2'73,322.

(N0 model.)

T0 all w7wm it.may conoern:

Be it known that I, SYLVANUS D.'LOCKE, a eitizen 0f the Unitecl Stabes, resicling at H00- sick Falls, in the eounty of Rensselaer, State of New York, have invented eertain newand usefnl Improvements in Machines f0r Making Drive Chains, 0f whieh the following is a specification, reference being hacl therein to the aceompanying drawings.

This invention rela tes t0 a machine for making drivechain links, and am0ng the 0bjects in vie w are t0 provide a maehine f0r formir 1g links from rolled 0r sheet metal, so that the wo sicle bars ancl encl and sprocketbars 2Jre macle fr0n1 asingle integral pieee 0f metal 0f no larger area than the producecl link, and which is aclapted t0 pnnch the metal taken to form the opening 0f the link ancl roll the same to form a hollow eylindrieal sprocket-bar and end bar, thereby lessening ehe cost ancl produeing a strong, serviceable, easily-connectecl sprocket-ehain.

Other obj eets and aclvantages 0f the invention Will hereinafter appear, ancl the novel features 0f the sa1ne will be particularly pointecl 01111 in the claims.

Referring 130 the drawings, Fignre 1 is a perspective view of the essential parts of a machine for aecomplishing the purposes in view, constrneted in aecordance With myinx ention, and illustrating the first position 0f the blank within he Same. Fig. 2 is a front elevation. Figs. 3 and 4 are vertical sections 0f the pnnching-clies, showing, respectively, the punching partly ancl wholly completecl. Figs. 5, 6, ancl 7 are illustrations of the different positions assumed by the for1ners 0r (lies, by Whi0h the loop 01 hook parts 0f the encl and sprocket bars are macle. Fig. 8 is a side elevation 0f tw0 eonneetecl links, ancl Fig. 9 is a view 0f ehe eompletecl link.

Like letters 0f referenee indicate like parts in all the figures 0f the clrawings.

The product of this maehine forms the subjeet-matter of a companion applieation, (Serial N0. 268,400, filed Mareh 24, 1888,) anal n0 clain1 is herein macle f0r the link. Only those portions 0f the machine t0 which elai1ns of novelty are made are herein illustratecl, as the means for operating the Same are com1non in this dass 0f inventions, and henee an illustracion thereof is considered unnecessary. y

Refening to Fig'. S, A represents a link aclaptecl to be formed by lthe maehine hereinafter deseribed, and the same consists 0.f tw0 opposite sicle hars, a, a rectangular eentral opening, b, a sproeket-bar, c e, ancl end bar, d

f. The sprocket-bar and-encl bar are 0f the san1e hollow substantially-cylinclrical forn1, the laoter, however, having its outer diameter slightly smaller than the inner diameter 0f the former, so as t0 allow the encl bar t0 freely turn or pivot in the sprocket-bar of an acljacent link. The bars c 0f the sprocket-bar ancl d 0f the encl bar are bent- 01 eurved upwardly, as shown, fron1 the encls 0f the link, while the hook 01 loop bars e and f 0f tl1e same are punehecl Clown fr0n1 the bocly thereof, leav ing the recangular opening b, ancl then turned outwarcl ancl upwarcl, as shown. The 1netal, punchecl to forn1 the eentral opening 0f the Link, is utilizecl completely by ehe loops e f. T0 join er couple links thus eonstructecl, it is only necess'ary t0 hold then1 so that the l0op f 0f 0ne ean be inserted within the loop e of another, the hollow end 0f 0ne resting 0n the edge 0f the bar c 0f the sprocket-bar 0f the other. Then by swinging t-he link in the right hancl down 011 that edge as a piw*0t nntil the encl bar is swung into the hollow of the Sprocket-bar a eonneetion Will be formed.

The above-cleseribed link is 1nade fron1 a Single piece 0f metal punchecl from a sheet 0f the desired thiekness 01 fr01n a strap of the same 0f the exaen width 0f the link.

B represents a punch operated byany suitable punehing-maehine, and C a punch-block.

A strip of 1netal being inserted between the pu'nch ancl its block, a single Stroke of the puneh Will forn1 two unequal lips in the 1netal, first a large one at the right for the sprocketbar, and then a s1naller one at the left f01 the end bar. The Str0ke eontinuing, the link is cut off 0r 0ut 0f the full plate, and finally, at the e0nolusion 0f the stroke, t-l1e upper face of the link is forrned, of the exact outline desired.

- The large lip s 0f the link is cut 01113 ancl driven directly cl0wn by an aclvancing punch memher, f, and the smaller lip, t, 0f the link is formed by ehe folloWing puneh n1e1nber g. The edge of the punch member f works against a shear-bloek, n, that is interposed for this purpose in the punch-block, with its upper faee on a level With the faee c of the 

